Automatic sampling device.



R.' HAMILTON,-

AUTOMATIC SAMFLING DEVICE. APPLICATION FILED Nov. II, 1914.

mll, Patented Aug. 3L

yp/M @l ZK j@ parts and selectfor ROBERT HAMILTON, OF BIRMINGHAM, ALABAM..

AUTOMATC SAMPLING DEVICE.

Speccaton oi Eetters Patent.

Patented Aug. 81, 19315..

Application led November 11, 1914.. Serial No. 871,465.

To all whom it may concern citizen of the United States, and resident of Birmingham, in the county of .iedereen and State of Alabama, have invented certain new and useful Improvements in Automatic Sampling Devices, of which the following is a specification. A

Frequently it is desired to selleQJ samples for testing purposes from diiierent 'portions of a mass of material. Many devices have been suggested for accomplishing this result during the flow of the material, but many thereof are objectionable due to complexity and cost of manufacture.

One of the objects of my invention is to provide a simple, inexpensive device, by means of which fractional portions of abody ol granular material may be selected without materially interrupting or interfering with the liow of the material. ln the device here illustrated l automatically select a sample, divide this sample into four parts, then divide one of such four parts into twenty-four sampling one of said twenty-four parts, the result being a selection of oneninetysiXth (1-96th) of the material for testing purposes. l attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a side elevation showing the form of machine and arrangement of hopper, ,spur wheels, crank, etc.; Fig. 2 is a transverse section normal to the center shaft, and Fig. 3 is a section on line 3 3- or Fig. 2.

The sides 1 and 2 and the top 8, secured together, constitute the frame work of the machine. ln the sides 1 and 2 are bearings 4 and 5 which carry a shaft 6, a cylinder` 7 keyed to said shaft. Supported by, and freely rotatable on the same shaft 6, is another cylinder 8. Secured to or integral with the .cylinder or bucket low trunnion or stub shaft 8a which has a bearing for, and supports said shaft in the bearing 4l. Fastened to the stub shaft 8 at its outer end is a spur gear 9. At lthe outer or overhung end of the shaft 6 is keyed a spur gear 10. Secured to side 1, and in a bracket 11 in suitable bearings, is a shaft 11. Keyed to this shaft are two spur gears 12 and 13 which mesh with gears 9 and 10 respectively on shaft 6. 'At the outer end .of'shaft 11 is a crank 14 for transmitting l5.

- servedthat the revolution of the shaft 11 rotary motion to shaft 11. 1t will be obwheel 8 is a hol-l 'through pocket 15 into will cause revolution of the cylinders 7 and 8 within the frame work of the machines. The gears 9, 10, 12 and 13 are of such proportions that cylinder 8 makes-four revolutions while cylinder 7 makes one in the same direction.

ln the periphery of cylinder 8 are twenty- :tour pockets, three of which are open, the open spaces being indicated by the numerals 15, and are placed at equidistant position on the periphery of said cylinder, thus forming a seri/es of seven closed pockets 20 between themn pockets 15. ln the periphery of cylinder 7 are twelve pockets-eleven closed 21,and placed a hopper 16 oi3` any suitable shape and size, into which is dumped the material to be sampled. Leading from the central portion of the machine is a chute 17, to carry oil' the material separated by the machine for testing. chine is open to permit the material passing through the machine being carried away or piled.

llhe operation is as follows: The material to .be sampled is fed into the hopper 16, and falls into the exposed pockets in the periphery of the cylinder 8. The crank 14 is then turned thus causing cylinders 7 and 8V to revolve in the same direction, cylinder 8 revolving four times as fast asl cylinder 7. lt will be observed that three times in every revolution of cylinder 8 the material falls through the open pockets into pockets in the cylinder 7, and that once in every four revolutions of cylinder 8, one open pocket 15, of same will register with open pocket 18 of cylinder 7 and allow material to fall through said pocket 18 into chute 17 and be carried away for testing purposes. Material falling into closed pockets 20 is carried to the underside of cylinder 8 and discharged. Material falling through pockets 15 into pockets 21 is carried to the underside of the cylinder and discharged onto the inner face of cylinder 8 and finally' falls out through open pockets 15 where they are in the downward positions, into a suitable receiver. At each revolution three samples of every twenty four from cylinder '8 are discharged into cylinder 7 and one sample out of ninety six fed into the machine finds -its way out through cylinder 7 into1 chute 17, and into the lot received for testing.v To

prevent the material 18 .while cylinder 8 one open 18. @n the top plate 3 is The lower portion oit' the mau ne from' passing directly L is revolving past hopper 16 a stop 22 is cast integral Withside 2 of the frame. Also stop 23 is cast integral with the frame in the position shown to carry `material discharged into pocket 18 to be discharged into chute 17.

I do not limit my invention to the exact form and arrangement shown, but consider such modifications as are within the scope of my claims as being Within the spirit of my invention. l l

I claim:

l. In a sampling device, a plurality of bucket Wheels, one being mounted for. rotation Within' another, means for rotating said Wheels at different speeds, at least one of the buckets on the periphery of each Wheel being open at the bottom to permit the passage of its portion of the material toward the axis of the Wheel, substantially as described.

2. In a sampling device, the combination of va casing, a plurality of concentric bucket Wheels mounted for rotation Within said casing, at least one vof the buckets in the periphery of each wheel being open at the bottom tov permit the passage towardthe axis of the Wheels of its portion of the material fed, and means vfor rotating said Wheels at different speeds, substantially as describecil.V

In a sampling device, the combination of a casing, a pair of Wheels concentrically mounted within said casing, said Wheels being provided With aplurality of pockets in their peripheries, at least oneof said pockets being open at the bottom, means for rotating said Wheels at dierent speeds, and a baille for preventing the direct passage of material to the interior throu h registering open spaces, substantially as c escribed.

Signed at Birmingham this fourth day of November, 1914.

ROBERT HAMILTON.

Witnesses WM. RICHARDSON, Jr., E1 D. LEMor.

y Copies of this patent may be obtained for five cents each, by addressing" the Commissioner of Patents.

Washington, D. C. 

